Pith Number

pith:WBPQ5T4D

pith:2015:WBPQ5T4DD4HBHAVP7ROQ7LROM2

not attested not anchored not stored refs pending

Reconstructing the nature of the first cosmic sources from the anisotropic 21-cm signal

(2) Tel Aviv University), Anastasia Fialkov (1), Aviad Cohen (2) ((1) Ecole Normale Superieure, Paris, Rennan Barkana (2)

arxiv:1502.02731 v1 · 2015-02-09 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WBPQ5T4DD4HBHAVP7ROQ7LROM2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:41:04.064349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b05f0ecf831f0e1382affc5d0fae2e66820e095239ee09fa53c0bf6760c896e6

Aliases

arxiv: 1502.02731 · arxiv_version: 1502.02731v1 · doi: 10.48550/arxiv.1502.02731 · pith_short_12: WBPQ5T4DD4HB · pith_short_16: WBPQ5T4DD4HBHAVP · pith_short_8: WBPQ5T4D

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/WBPQ5T4DD4HBHAVP7ROQ7LROM2 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b05f0ecf831f0e1382affc5d0fae2e66820e095239ee09fa53c0bf6760c896e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "322e3fc4c57aa43a4d15d0fe6151999f5ec47b429d6ca3e0585cccb96609b3ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-02-09T23:33:47Z",
    "title_canon_sha256": "6901038f20f39b0c7f689ae8f0086856083c92163cdfce80d7ed1041508f0c3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02731",
    "kind": "arxiv",
    "version": 1
  }
}